Add liquidity pool statistics and new APIs

[abitmore]

For issue #2280.

• Added some liquidity pool statistics in market history plugin
• Extended existing liquidity pool APIs with an optional with_statistics parameter
  • list_liquidity_pools( limit, start_pool_id, with_statistics )
  • get_liquidity_pools_by_asset_a( asset, limit, start_pool_id, with_statistics )
  • get_liquidity_pools_by_asset_b( asset, limit, start_pool_id, with_statistics )
  • get_liquidity_pools_by_both_assets( asset_a, asset_b, limit, start_pool_id, with_statistics )
  • get_liquidity_pools_by_share_asset( assets_vector, subscribe, with_statistics )
  • get_liquidity_pools_by_owner( account, limit, start_share_asset_id, with_statistics )
• Added a new database API
  • get_liquidity_pools( pool_IDs, subscribe, with_statistics )
• Added history APIs
  • history_api::get_liquidity_pool_history( pool_id, start_time, stop_time, limit, operation_type )
  • history_api::get_liquidity_pool_history_by_sequence( pool_id, start_sequence, stop_time, limit, operation_type )

[sschiessl-bcp]

What does the comment on the market history plugin mean?
Can I fetch liquidity pool in bucket-style like market history somehow?

I'm showing calculated price right now since I did not want to recreate bucket logic yet

[abitmore]

The bucket logic hasn't been done for liquidity pools. What you have are described in OP.

[sschiessl-bcp]

The bucket logic hasn't been done for liquidity pools. What you have are described in OP.

Are there any plans to add it with next API upgrade, or would you oppose a PR adding it?

[abitmore]

@sschiessl-bcp No plan yet. Just haven't got time, and didn't see a strong use case. If you really want it, I can add it when got time.
BTW I think it's not hard to get the data via ES / Kibana and they're more flexible.

[sschiessl-bcp]

BTW I think it's not hard to get the data via ES / Kibana and they're more flexible.

No, not hard. But then all existing code that works with market history is directly compatible, which would be nice.

For the explorer, I recreated it now, just FYI
https://blocksights.info/#/pools/1.19.61